<h2>{{uploadTitle}}</h2>
<div class="fd-upload">
    <input id="{{elementId}}" style="opacity: 0" type="file" (change)="inputChange($event)" multiple="false" />
    <span class="fd-file-name">{{fileName}}</span>
    <button type="button" class="btn btn-primary fd-upload-btn" (click)="selectFile()">选择文件</button>
</div>
